PART 3: Read the paragraph below and answer the questora that follow. When a firefighter tamra on a hose, water comes out of the nozzle in one direction, and the hose moves back in the opposite direction. You can explain why by using Newton's third law. The water & forced out of the hose. A reaction force pushes the hose backward You can also use the principle of conservation of momentum to explain why the hose moves backward Before the firefighter turns on the water, the hose and the water are not in motion, so the hose water system has no momentum. Once the water & tumed on, the water has momentum in the forward direction. For the total momentum of the hose and the water to stay the same, the hose must have an equal amount of momentum in the opposite direction. The hose moves backward. If the hose and the water are not acted on by any other forces, momentum is conserved. Whater is pushed forward, and the hose is pushed backward. However, the action and reaction force pai acing on the hose and the water are not usually the only forces acting on the hose water s soom. There the firefighters are holding the hose steady. The force the firefighters apply i called an outside force because it is not being applied by the hose or the water. When there is an outside force on a system, momentum & not conserved Because the firefighter hold the host, the hose does not move backwand, even though the water has a fonard momentum. 1. Under what condition & momentum not comicved? (1 pt) 2. What part of the paragraph above tells you this? [1 pt) 3. (2 pi.] @ the firemen drop the hose, what would happen to the hose? Explain why using conservation of momentum